third_party/WebKit/Source/platform/wtf/DateMath.cpp - Issue 2774333002: Revert "Move files in wtf/ to platform/wtf/"

Unified Diff: third_party/WebKit/Source/platform/wtf/DateMath.cpp

Issue 2774333002: Revert "Move files in wtf/ to platform/wtf/" (Closed)

Patch Set: Created 3 years, 9 months ago

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Index: third_party/WebKit/Source/platform/wtf/DateMath.cpp

diff --git a/third_party/WebKit/Source/platform/wtf/DateMath.cpp b/third_party/WebKit/Source/platform/wtf/DateMath.cpp

deleted file mode 100644

index aba3323b00a7eb033760d2617492f051ca9264a0..0000000000000000000000000000000000000000

--- a/third_party/WebKit/Source/platform/wtf/DateMath.cpp

+++ /dev/null

@@ -1,842 +0,0 @@

-/*

- *

- * The Original Code is Mozilla Communicator client code, released

- * March 31, 1998.

- *

- * The Initial Developer of the Original Code is

- * Netscape Communications Corporation.

- *

- * This library is free software; you can redistribute it and/or

- * modify it under the terms of the GNU Lesser General Public

- * License as published by the Free Software Foundation; either

- * version 2.1 of the License, or (at your option) any later version.

- *

- * This library is distributed in the hope that it will be useful,

- * but WITHOUT ANY WARRANTY; without even the implied warranty of

- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

- * Lesser General Public License for more details.

- *

- * You should have received a copy of the GNU Lesser General Public

- * License along with this library; if not, write to the Free Software

- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

- *

- * Alternatively, the contents of this file may be used under the terms

- * of either the Mozilla Public License Version 1.1, found at

- * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public

- * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html

- * (the "GPL"), in which case the provisions of the MPL or the GPL are

- * applicable instead of those above. If you wish to allow use of your

- * version of this file only under the terms of one of those two

- * licenses (the MPL or the GPL) and not to allow others to use your

- * version of this file under the LGPL, indicate your decision by

- * deletingthe provisions above and replace them with the notice and

- * other provisions required by the MPL or the GPL, as the case may be.

- * If you do not delete the provisions above, a recipient may use your

- * version of this file under any of the LGPL, the MPL or the GPL.

- * Redistribution and use in source and binary forms, with or without

- * modification, are permitted provided that the following conditions are

- * met:

- *

- * * Redistributions of source code must retain the above copyright

- * notice, this list of conditions and the following disclaimer.

- * * Redistributions in binary form must reproduce the above

- * copyright notice, this list of conditions and the following

- * disclaimer in the documentation and/or other materials provided

- * with the distribution.

- * * Neither the name of Google Inc. nor the names of its

- * contributors may be used to endorse or promote products derived

- * from this software without specific prior written permission.

- *

- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

- */

-#include "platform/wtf/DateMath.h"

-#include "platform/wtf/ASCIICType.h"

-#include "platform/wtf/Assertions.h"

-#include "platform/wtf/CurrentTime.h"

-#include "platform/wtf/MathExtras.h"

-#include "platform/wtf/StdLibExtras.h"

-#include "platform/wtf/StringExtras.h"

-#include "platform/wtf/text/StringBuilder.h"

-#include <algorithm>

-#include <limits.h>

-#include <limits>

-#include <math.h>

-#include <stdlib.h>

-#include <time.h>

-#if OS(WIN)

-#include <windows.h>

-#else

-#include <sys/time.h>

-#endif

-namespace WTF {

-/* Constants */

-static const double hoursPerDay = 24.0;

-static const double secondsPerDay = 24.0 * 60.0 * 60.0;

-static const double maxUnixTime = 2145859200.0; // 12/31/2037

-static const double kMinimumECMADateInMs = -8640000000000000.0;

-static const double kMaximumECMADateInMs = 8640000000000000.0;

-// Day of year for the first day of each month, where index 0 is January, and

-// day 0 is January 1. First for non-leap years, then for leap years.

-static const int firstDayOfMonth[2][12] = {

- {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334},

- {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335}};

-static inline void getLocalTime(const time_t* localTime, struct tm* localTM) {

-#if COMPILER(MSVC)

- localtime_s(localTM, localTime);

-#else

- localtime_r(localTime, localTM);

-#endif

-bool isLeapYear(int year) {

- if (year % 4 != 0)

- return false;

- if (year % 400 == 0)

- return true;

- if (year % 100 == 0)

- return false;

- return true;

-static inline int daysInYear(int year) {

- return 365 + isLeapYear(year);

-static inline double daysFrom1970ToYear(int year) {

- // The Gregorian Calendar rules for leap years:

- // Every fourth year is a leap year. 2004, 2008, and 2012 are leap years.

- // However, every hundredth year is not a leap year. 1900 and 2100 are not

- // leap years.

- // Every four hundred years, there's a leap year after all. 2000 and 2400 are

- // leap years.

- static const int leapDaysBefore1971By4Rule = 1970 / 4;

- static const int excludedLeapDaysBefore1971By100Rule = 1970 / 100;

- static const int leapDaysBefore1971By400Rule = 1970 / 400;

- const double yearMinusOne = year - 1;

- const double yearsToAddBy4Rule =

- floor(yearMinusOne / 4.0) - leapDaysBefore1971By4Rule;

- const double yearsToExcludeBy100Rule =

- floor(yearMinusOne / 100.0) - excludedLeapDaysBefore1971By100Rule;

- const double yearsToAddBy400Rule =

- floor(yearMinusOne / 400.0) - leapDaysBefore1971By400Rule;

- return 365.0 * (year - 1970) + yearsToAddBy4Rule - yearsToExcludeBy100Rule +

- yearsToAddBy400Rule;

-static double msToDays(double ms) {

- return floor(ms / msPerDay);

-static void appendTwoDigitNumber(StringBuilder& builder, int number) {

- DCHECK_GE(number, 0);

- DCHECK_LT(number, 100);

- if (number <= 9)

- builder.append('0');

- builder.appendNumber(number);

-int msToYear(double ms) {

- DCHECK(std::isfinite(ms));

- DCHECK_GE(ms, kMinimumECMADateInMs);

- DCHECK_LE(ms, kMaximumECMADateInMs);

- int approxYear = static_cast<int>(floor(ms / (msPerDay * 365.2425)) + 1970);

- double msFromApproxYearTo1970 = msPerDay * daysFrom1970ToYear(approxYear);

- if (msFromApproxYearTo1970 > ms)

- return approxYear - 1;

- if (msFromApproxYearTo1970 + msPerDay * daysInYear(approxYear) <= ms)

- return approxYear + 1;

- return approxYear;

-int dayInYear(double ms, int year) {

- return static_cast<int>(msToDays(ms) - daysFrom1970ToYear(year));

-static inline double msToMilliseconds(double ms) {

- double result = fmod(ms, msPerDay);

- if (result < 0)

- result += msPerDay;

- return result;

-int monthFromDayInYear(int dayInYear, bool leapYear) {

- const int d = dayInYear;

- int step;

- if (d < (step = 31))

- return 0;

- step += (leapYear ? 29 : 28);

- if (d < step)

- return 1;

- if (d < (step += 31))

- return 2;

- if (d < (step += 30))

- return 3;

- if (d < (step += 31))

- return 4;

- if (d < (step += 30))

- return 5;

- if (d < (step += 31))

- return 6;

- if (d < (step += 31))

- return 7;

- if (d < (step += 30))

- return 8;

- if (d < (step += 31))

- return 9;

- if (d < (step += 30))

- return 10;

- return 11;

-static inline bool checkMonth(int dayInYear,

- int& startDayOfThisMonth,

- int& startDayOfNextMonth,

- int daysInThisMonth) {

- startDayOfThisMonth = startDayOfNextMonth;

- startDayOfNextMonth += daysInThisMonth;

- return (dayInYear <= startDayOfNextMonth);

-int dayInMonthFromDayInYear(int dayInYear, bool leapYear) {

- const int d = dayInYear;

- int step;

- int next = 30;

- if (d <= next)

- return d + 1;

- const int daysInFeb = (leapYear ? 29 : 28);

- if (checkMonth(d, step, next, daysInFeb))

- return d - step;

- if (checkMonth(d, step, next, 31))

- return d - step;

- if (checkMonth(d, step, next, 30))

- return d - step;

- if (checkMonth(d, step, next, 31))

- return d - step;

- if (checkMonth(d, step, next, 30))

- return d - step;

- if (checkMonth(d, step, next, 31))

- return d - step;

- if (checkMonth(d, step, next, 31))

- return d - step;

- if (checkMonth(d, step, next, 30))

- return d - step;

- if (checkMonth(d, step, next, 31))

- return d - step;

- if (checkMonth(d, step, next, 30))

- return d - step;

- step = next;

- return d - step;

-int dayInYear(int year, int month, int day) {

- return firstDayOfMonth[isLeapYear(year)][month] + day - 1;

-double dateToDaysFrom1970(int year, int month, int day) {

- year += month / 12;

- month %= 12;

- if (month < 0) {

- month += 12;

- --year;

- }

- double yearday = floor(daysFrom1970ToYear(year));

- DCHECK((year >= 1970 && yearday >= 0) || (year < 1970 && yearday < 0));

- return yearday + dayInYear(year, month, day);

-// There is a hard limit at 2038 that we currently do not have a workaround

-// for (rdar://problem/5052975).

-static inline int maximumYearForDST() {

- return 2037;

-static inline double jsCurrentTime() {

- // JavaScript doesn't recognize fractions of a millisecond.

- return floor(WTF::currentTimeMS());

-static inline int minimumYearForDST() {

- // Because of the 2038 issue (see maximumYearForDST) if the current year is

- // greater than the max year minus 27 (2010), we want to use the max year

- // minus 27 instead, to ensure there is a range of 28 years that all years

- // can map to.

- return std::min(msToYear(jsCurrentTime()), maximumYearForDST() - 27);

-// Find an equivalent year for the one given, where equivalence is deterined by

-// the two years having the same leapness and the first day of the year, falling

-// on the same day of the week.

-//

-// This function returns a year between this current year and 2037, however this

-// function will potentially return incorrect results if the current year is

-// after 2010, (rdar://problem/5052975), if the year passed in is before 1900

-// or after 2100, (rdar://problem/5055038).

-static int equivalentYearForDST(int year) {

- // It is ok if the cached year is not the current year as long as the rules

- // for DST did not change between the two years; if they did the app would

- // need to be restarted.

- static int minYear = minimumYearForDST();

- int maxYear = maximumYearForDST();

- int difference;

- if (year > maxYear)

- difference = minYear - year;

- else if (year < minYear)

- difference = maxYear - year;

- else

- return year;

- int quotient = difference / 28;

- int product = (quotient)*28;

- year += product;

- DCHECK((year >= minYear && year <= maxYear) ||

- (product - year ==

- static_cast<int>(std::numeric_limits<double>::quiet_NaN())));

- return year;

-static double calculateUTCOffset() {

-#if OS(WIN)

- TIME_ZONE_INFORMATION timeZoneInformation;

- GetTimeZoneInformation(&timeZoneInformation);

- int32_t bias = timeZoneInformation.Bias + timeZoneInformation.StandardBias;

- return -bias * 60 * 1000;

-#else

- time_t localTime = time(0);

- tm localt;

- getLocalTime(&localTime, &localt);

- // tm_gmtoff includes any daylight savings offset, so subtract it.

- return static_cast<double>(localt.tm_gmtoff * msPerSecond -

- (localt.tm_isdst > 0 ? msPerHour : 0));

-#endif

-/*

- * Get the DST offset for the time passed in.

- */

-static double calculateDSTOffsetSimple(double localTimeSeconds,

- double utcOffset) {

- if (localTimeSeconds > maxUnixTime)

- localTimeSeconds = maxUnixTime;

- else if (localTimeSeconds <

- 0) // Go ahead a day to make localtime work (does not work with 0)

- localTimeSeconds += secondsPerDay;

- // FIXME: time_t has a potential problem in 2038

- time_t localTime = static_cast<time_t>(localTimeSeconds);

- tm localTM;

- getLocalTime(&localTime, &localTM);

- return localTM.tm_isdst > 0 ? msPerHour : 0;

-// Get the DST offset, given a time in UTC

-static double calculateDSTOffset(double ms, double utcOffset) {

- // On macOS, the call to localtime (see calculateDSTOffsetSimple) will return

- // historically accurate DST information (e.g. New Zealand did not have DST

- // from 1946 to 1974) however the JavaScript standard explicitly dictates

- // that historical information should not be considered when determining DST.

- // For this reason we shift away from years that localtime can handle but

- // would return historically accurate information.

- int year = msToYear(ms);

- int equivalentYear = equivalentYearForDST(year);

- if (year != equivalentYear) {

- bool leapYear = isLeapYear(year);

- int dayInYearLocal = dayInYear(ms, year);

- int dayInMonth = dayInMonthFromDayInYear(dayInYearLocal, leapYear);

- int month = monthFromDayInYear(dayInYearLocal, leapYear);

- double day = dateToDaysFrom1970(equivalentYear, month, dayInMonth);

- ms = (day * msPerDay) + msToMilliseconds(ms);

- }

- return calculateDSTOffsetSimple(ms / msPerSecond, utcOffset);

-void initializeDates() {

-#if DCHECK_IS_ON()

- static bool alreadyInitialized;

- DCHECK(!alreadyInitialized);

- alreadyInitialized = true;

-#endif

- equivalentYearForDST(

- 2000); // Need to call once to initialize a static used in this function.

-static inline double ymdhmsToSeconds(int year,

- long mon,

- long day,

- long hour,

- long minute,

- double second) {

- double days =

- (day - 32075) + floor(1461 * (year + 4800.0 + (mon - 14) / 12) / 4) +

- 367 * (mon - 2 - (mon - 14) / 12 * 12) / 12 -

- floor(3 * ((year + 4900.0 + (mon - 14) / 12) / 100) / 4) - 2440588;

- return ((days * hoursPerDay + hour) * minutesPerHour + minute) *

- secondsPerMinute +

- second;

-// We follow the recommendation of RFC 2822 to consider all

-// obsolete time zones not listed here equivalent to "-0000".

-static const struct KnownZone {

-#if !OS(WIN)

- const

-#endif

- char tzName[4];

- int tzOffset;

-} known_zones[] = {{"UT", 0}, {"GMT", 0}, {"EST", -300}, {"EDT", -240},

- {"CST", -360}, {"CDT", -300}, {"MST", -420}, {"MDT", -360},

- {"PST", -480}, {"PDT", -420}};

-inline static void skipSpacesAndComments(const char*& s) {

- int nesting = 0;

- char ch;

- while ((ch = *s)) {

- if (!isASCIISpace(ch)) {

- if (ch == '(')

- nesting++;

- else if (ch == ')' && nesting > 0)

- nesting--;

- else if (nesting == 0)

- break;

- }

- s++;

- }

-// returns 0-11 (Jan-Dec); -1 on failure

-static int findMonth(const char* monthStr) {

- DCHECK(monthStr);

- char needle[4];

- for (int i = 0; i < 3; ++i) {

- if (!*monthStr)

- return -1;

- needle[i] = static_cast<char>(toASCIILower(*monthStr++));

- }

- needle[3] = '\0';

- const char* haystack = "janfebmaraprmayjunjulaugsepoctnovdec";

- const char* str = strstr(haystack, needle);

- if (str) {

- int position = static_cast<int>(str - haystack);

- if (position % 3 == 0)

- return position / 3;

- }

- return -1;

-static bool parseInt(const char* string,

- char** stopPosition,

- int base,

- int* result) {

- long longResult = strtol(string, stopPosition, base);

- // Avoid the use of errno as it is not available on Windows CE

- if (string == *stopPosition ||

- longResult <= std::numeric_limits<int>::min() ||

- longResult >= std::numeric_limits<int>::max())

- return false;

- *result = static_cast<int>(longResult);

- return true;

-static bool parseLong(const char* string,

- char** stopPosition,

- int base,

- long* result) {

- *result = strtol(string, stopPosition, base);

- // Avoid the use of errno as it is not available on Windows CE

- if (string == *stopPosition || *result == std::numeric_limits<long>::min() ||

- *result == std::numeric_limits<long>::max())

- return false;

- return true;

-// Odd case where 'exec' is allowed to be 0, to accomodate a caller in WebCore.

-static double parseDateFromNullTerminatedCharacters(const char* dateString,

- bool& haveTZ,

- int& offset) {

- haveTZ = false;

- offset = 0;

- // This parses a date in the form:

- // Tuesday, 09-Nov-99 23:12:40 GMT

- // or

- // Sat, 01-Jan-2000 08:00:00 GMT

- // or

- // Sat, 01 Jan 2000 08:00:00 GMT

- // or

- // 01 Jan 99 22:00 +0100 (exceptions in rfc822/rfc2822)

- // ### non RFC formats, added for Javascript:

- // [Wednesday] January 09 1999 23:12:40 GMT

- // [Wednesday] January 09 23:12:40 GMT 1999

- //

- // We ignore the weekday.

- // Skip leading space

- skipSpacesAndComments(dateString);

- long month = -1;

- const char* wordStart = dateString;

- // Check contents of first words if not number

- while (*dateString && !isASCIIDigit(*dateString)) {

- if (isASCIISpace(*dateString) || *dateString == '(') {

- if (dateString - wordStart >= 3)

- month = findMonth(wordStart);

- skipSpacesAndComments(dateString);

- wordStart = dateString;

- } else {

- dateString++;

- }

- // Missing delimiter between month and day (like "January29")?

- if (month == -1 && wordStart != dateString)

- month = findMonth(wordStart);

- skipSpacesAndComments(dateString);

- if (!*dateString)

- return std::numeric_limits<double>::quiet_NaN();

- // ' 09-Nov-99 23:12:40 GMT'

- char* newPosStr;

- long day;

- if (!parseLong(dateString, &newPosStr, 10, &day))

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- if (!*dateString)

- return std::numeric_limits<double>::quiet_NaN();

- if (day < 0)

- return std::numeric_limits<double>::quiet_NaN();

- int year = 0;

- if (day > 31) {

- // ### where is the boundary and what happens below?

- if (*dateString != '/')

- return std::numeric_limits<double>::quiet_NaN();

- // looks like a YYYY/MM/DD date

- if (!*++dateString)

- return std::numeric_limits<double>::quiet_NaN();

- if (day <= std::numeric_limits<int>::min() ||

- day >= std::numeric_limits<int>::max())

- return std::numeric_limits<double>::quiet_NaN();

- year = static_cast<int>(day);

- if (!parseLong(dateString, &newPosStr, 10, &month))

- return std::numeric_limits<double>::quiet_NaN();

- month -= 1;

- dateString = newPosStr;

- if (*dateString++ != '/' || !*dateString)

- return std::numeric_limits<double>::quiet_NaN();

- if (!parseLong(dateString, &newPosStr, 10, &day))

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- } else if (*dateString == '/' && month == -1) {

- dateString++;

- // This looks like a MM/DD/YYYY date, not an RFC date.

- month = day - 1; // 0-based

- if (!parseLong(dateString, &newPosStr, 10, &day))

- return std::numeric_limits<double>::quiet_NaN();

- if (day < 1 || day > 31)

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- if (*dateString == '/')

- dateString++;

- if (!*dateString)

- return std::numeric_limits<double>::quiet_NaN();

- } else {

- if (*dateString == '-')

- dateString++;

- skipSpacesAndComments(dateString);

- if (*dateString == ',')

- dateString++;

- if (month == -1) { // not found yet

- month = findMonth(dateString);

- if (month == -1)

- return std::numeric_limits<double>::quiet_NaN();

- while (*dateString && *dateString != '-' && *dateString != ',' &&

- !isASCIISpace(*dateString))

- dateString++;

- if (!*dateString)

- return std::numeric_limits<double>::quiet_NaN();

- // '-99 23:12:40 GMT'

- if (*dateString != '-' && *dateString != '/' && *dateString != ',' &&

- !isASCIISpace(*dateString))

- return std::numeric_limits<double>::quiet_NaN();

- dateString++;

- }

- if (month < 0 || month > 11)

- return std::numeric_limits<double>::quiet_NaN();

- // '99 23:12:40 GMT'

- if (year <= 0 && *dateString) {

- if (!parseInt(dateString, &newPosStr, 10, &year))

- return std::numeric_limits<double>::quiet_NaN();

- }

- // Don't fail if the time is missing.

- long hour = 0;

- long minute = 0;

- long second = 0;

- if (!*newPosStr) {

- dateString = newPosStr;

- } else {

- // ' 23:12:40 GMT'

- if (!(isASCIISpace(*newPosStr) || *newPosStr == ',')) {

- if (*newPosStr != ':')

- return std::numeric_limits<double>::quiet_NaN();

- // There was no year; the number was the hour.

- year = -1;

- } else {

- // in the normal case (we parsed the year), advance to the next number

- dateString = ++newPosStr;

- skipSpacesAndComments(dateString);

- }

- parseLong(dateString, &newPosStr, 10, &hour);

- // Do not check for errno here since we want to continue

- // even if errno was set becasue we are still looking

- // for the timezone!

- // Read a number? If not, this might be a timezone name.

- if (newPosStr != dateString) {

- dateString = newPosStr;

- if (hour < 0 || hour > 23)

- return std::numeric_limits<double>::quiet_NaN();

- if (!*dateString)

- return std::numeric_limits<double>::quiet_NaN();

- // ':12:40 GMT'

- if (*dateString++ != ':')

- return std::numeric_limits<double>::quiet_NaN();

- if (!parseLong(dateString, &newPosStr, 10, &minute))

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- if (minute < 0 || minute > 59)

- return std::numeric_limits<double>::quiet_NaN();

- // ':40 GMT'

- if (*dateString && *dateString != ':' && !isASCIISpace(*dateString))

- return std::numeric_limits<double>::quiet_NaN();

- // seconds are optional in rfc822 + rfc2822

- if (*dateString == ':') {

- dateString++;

- if (!parseLong(dateString, &newPosStr, 10, &second))

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- if (second < 0 || second > 59)

- return std::numeric_limits<double>::quiet_NaN();

- }

- skipSpacesAndComments(dateString);

- if (strncasecmp(dateString, "AM", 2) == 0) {

- if (hour > 12)

- return std::numeric_limits<double>::quiet_NaN();

- if (hour == 12)

- hour = 0;

- dateString += 2;

- skipSpacesAndComments(dateString);

- } else if (strncasecmp(dateString, "PM", 2) == 0) {

- if (hour > 12)

- return std::numeric_limits<double>::quiet_NaN();

- if (hour != 12)

- hour += 12;

- dateString += 2;

- skipSpacesAndComments(dateString);

- }

- // The year may be after the time but before the time zone.

- if (isASCIIDigit(*dateString) && year == -1) {

- if (!parseInt(dateString, &newPosStr, 10, &year))

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- skipSpacesAndComments(dateString);

- }

- // Don't fail if the time zone is missing.

- // Some websites omit the time zone (4275206).

- if (*dateString) {

- if (strncasecmp(dateString, "GMT", 3) == 0 ||

- strncasecmp(dateString, "UTC", 3) == 0) {

- dateString += 3;

- haveTZ = true;

- }

- if (*dateString == '+' || *dateString == '-') {

- int o;

- if (!parseInt(dateString, &newPosStr, 10, &o))

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- if (o < -9959 || o > 9959)

- return std::numeric_limits<double>::quiet_NaN();

- int sgn = (o < 0) ? -1 : 1;

- o = abs(o);

- if (*dateString != ':') {

- if (o >= 24)

- offset = ((o / 100) * 60 + (o % 100)) * sgn;

- else

- offset = o * 60 * sgn;

- } else { // GMT+05:00

- ++dateString; // skip the ':'

- int o2;

- if (!parseInt(dateString, &newPosStr, 10, &o2))

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- offset = (o * 60 + o2) * sgn;

- }

- haveTZ = true;

- } else {

- for (size_t i = 0; i < WTF_ARRAY_LENGTH(known_zones); ++i) {

- if (0 == strncasecmp(dateString, known_zones[i].tzName,

- strlen(known_zones[i].tzName))) {

- offset = known_zones[i].tzOffset;

- dateString += strlen(known_zones[i].tzName);

- haveTZ = true;

- break;

- }

- skipSpacesAndComments(dateString);

- if (*dateString && year == -1) {

- if (!parseInt(dateString, &newPosStr, 10, &year))

- return std::numeric_limits<double>::quiet_NaN();

- dateString = newPosStr;

- skipSpacesAndComments(dateString);

- }

- // Trailing garbage

- if (*dateString)

- return std::numeric_limits<double>::quiet_NaN();

- // Y2K: Handle 2 digit years.

- if (year >= 0 && year < 100) {

- if (year < 50)

- year += 2000;

- else

- year += 1900;

- }

- return ymdhmsToSeconds(year, month + 1, day, hour, minute, second) *

- msPerSecond;

-double parseDateFromNullTerminatedCharacters(const char* dateString) {

- bool haveTZ;

- int offset;

- double ms = parseDateFromNullTerminatedCharacters(dateString, haveTZ, offset);

- if (std::isnan(ms))

- return std::numeric_limits<double>::quiet_NaN();

- // fall back to local timezone

- if (!haveTZ) {

- double utcOffset = calculateUTCOffset();

- double dstOffset = calculateDSTOffset(ms, utcOffset);

- offset = static_cast<int>((utcOffset + dstOffset) / msPerMinute);

- }

- return ms - (offset * msPerMinute);

-// See http://tools.ietf.org/html/rfc2822#section-3.3 for more information.

-String makeRFC2822DateString(unsigned dayOfWeek,

- unsigned day,

- unsigned month,

- unsigned year,

- unsigned hours,

- unsigned minutes,

- unsigned seconds,

- int utcOffset) {

- StringBuilder stringBuilder;

- stringBuilder.append(weekdayName[dayOfWeek]);

- stringBuilder.append(", ");

- stringBuilder.appendNumber(day);

- stringBuilder.append(' ');

- stringBuilder.append(monthName[month]);

- stringBuilder.append(' ');

- stringBuilder.appendNumber(year);

- stringBuilder.append(' ');

- appendTwoDigitNumber(stringBuilder, hours);

- stringBuilder.append(':');

- appendTwoDigitNumber(stringBuilder, minutes);

- stringBuilder.append(':');

- appendTwoDigitNumber(stringBuilder, seconds);

- stringBuilder.append(' ');

- stringBuilder.append(utcOffset > 0 ? '+' : '-');

- int absoluteUTCOffset = abs(utcOffset);

- appendTwoDigitNumber(stringBuilder, absoluteUTCOffset / 60);

- appendTwoDigitNumber(stringBuilder, absoluteUTCOffset % 60);

- return stringBuilder.toString();

-double convertToLocalTime(double ms) {

- double utcOffset = calculateUTCOffset();

- double dstOffset = calculateDSTOffset(ms, utcOffset);

- return (ms + utcOffset + dstOffset);

-} // namespace WTF

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